Fix undefined reference to 'close_used_without_including_unistd_h'

Found while trying to cross-compile libvirt on Fedora 12 for Windows.
gnulib redefines 'close' to 'close_used_without_including_unistd_h'
in sys/socket.h if winsock2.h is present and unistd.h has not been
included before sys/socket.h. Reorder some includes to fix this.

src/conf/network_conf.c

@@ -25,10 +25,10 @@
 
 #include <config.h>
 
+#include <unistd.h>
 #include <arpa/inet.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
 #include <dirent.h>

src/remote/remote_driver.c

@@ -23,10 +23,6 @@
 
 #include <config.h>
 
-/* Windows socket compatibility functions. */
-#include <errno.h>
-#include <sys/socket.h>
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -37,6 +33,10 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+/* Windows socket compatibility functions. */
+#include <errno.h>
+#include <sys/socket.h>
+
 #ifndef HAVE_WINSOCK2_H /* Unix & Cygwin. */
 # include <sys/un.h>
 # include <net/if.h>

src/util/util.h

@@ -27,6 +27,7 @@
 
 #include "verify.h"
 #include "internal.h"
+#include <unistd.h>
 #include <sys/select.h>
 #include <sys/types.h>